If the parents are homozygous and have different colors such as black (recessive) and white (dominant) then the offspring will have the color of the dominant allele.
According to Mendel's laws there are two types of alleles, dominant and recessive, when the parents are dominant homozygous they have an AA genotype and if they are recessive homozygous they have an aa genotype, when reproducing all their offspring they will have an Aa genotype and only the allele will be expressed dominant, in this case white.
in mendelian genetic , allele of each genes from the parents will segregate from each other so the gametes only carry one each.
If the parental mice has two different fur color (i.e white and Black) , the color of the offspring's fur would be either black, white, or the combination of both (Grey)
